Question about 1996 Chevrolet Suburban

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PCM module, ECM module 1996 Chevy Suburban K model

Where are these modules located in this vehicle?

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  • rickh62638 Feb 26, 2009

    where is pcm on 1990 suburban, and how do you test it

  • Anonymous Mar 24, 2014

    powertrain control module pcm on a 2001 chevy 3800

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Powertrain Control Module = under right side of dash, near blower motor.
Engine Control Module = same as above
Vehicle Control Module = same as above

All Suburban vehicles are equipped with only one of these choices. Good luck.

Posted on Oct 04, 2008

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The PCM on a 96 chevy surburban k1500 is located under the hood of the car on the driver side not inside under the dash by the blower motor

Posted on Nov 19, 2008

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Where is the ecm or pcm on a 2000 surbuban chevy

Posted on Aug 21, 2009

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1 Answer

Need the wiring diagram for 2005 Chevy trailblazer underhood fuse block, starting circuit.


Do you know if it is ECM/PCM or BCM controlled ?
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.

Free wiring diagrams here
http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on engine ,then under subsystem click on starting . Click the search button ,then click the blue link .
If you look at the diagram you will see the ignition switch ,when in start it sends B+ voltage to the ECM/PCM or depending on which system or engine to the BCM . When it see's this input it will energize the starter relay located in the under hood fuse box. This happens if the control module in charge see's another input from the PNP- park neutral position sensor and if no anti-theft system problems .
Good luck !

Sep 30, 2017 | Cars & Trucks

1 Answer

Cruse control on 2008 Chevy Suburban stopped working. Changed the brake lamp switch (twice). Any suggestions? Where is the fuse located?


This is a computer controlled system (BCM) supply's power to switch .Voltage is supplied to the cruise control switch via the steering wheel control switch reference voltage circuit supplied by the BCM.
The following are the main components of the Cruise Control System:
• The accelerator pedal
• The stop lamp switch
• The body control module (BCM)
• The cruise control switches
• The engine control module (ECM)
• The throttle actuator control (TAC) motor
• The vehicle speed sensor (VSS)

Taking your vehicle to a quailfied repair shop would be your best option . Using a factory scan tool to view input data from switches and sensors is the only way to diagnose the cruise control on your vehicle . Just replacing parts does not cut it .

The body control module (BCM) monitors the signal circuit of the cruise control switches. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order to maintain the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description .

This is not a fuse problem !!!!!!!!!

You probably don't know what GMLAN serial data is ,do you ? It's GM 's version of C.A.N. How to Diagnose Controller Area Network CAN

Feb 12, 2017 | Cars & Trucks

1 Answer

How do i change the Electronic Computer Module (ECM) in a 1996 pontiac 2.2 automatic sunfire


I would get a second opinion , there not the brightest people . Take it to a ASE certified repair shop or dealer . Does your vehicle start an run ? If the brain box was bad it probably would not .
Powertrain Control Module/EEPROM Replacement/Programming

Powertrain Control Module (PCM)
Notice: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.
Service of the PCM should normally consist of either replacement of the PCM, EEPROM re-programming or a KS module change.
If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked first to see if it is the correct part. If it is, remove the KS module from the faulty PCM and install it in the new service PCM. The service PCM will not contain a KS module. DTC P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, re-program the EEPROM. If a DTC P0325 is set, check the KS module for proper installation. If it is installed correctly and DTC P0325 is still displayed, replace the KS module.
The ignition should be OFF for at least 10 seconds before disconnecting power to the PCM so the IAC valve has time to move to the engine OFF position.

Mar 09, 2016 | 1996 Pontiac Sunfire

1 Answer

What is a pcm for chevy s10 22003 truck


WHAT is a PCM ? POWERTRAIN CONTROL MODULE, It is also called an ECM (Engine Control Module), it is also knows as the Computer. IT is located on your Drivers Side Fender inside the Engine Compartment.

Apr 04, 2013 | Cars & Trucks

1 Answer

Were is the ecm located?


  • REMOVAL & INSTALLATION
  • Print


    OPERATION

    When the term Electronic Control Module (ECM) is used in this guide it will refer to the engine control computer regardless that it may be a Vehicle Control Module (VCM), Powertrain Control Module (PCM) or Engine Control Module (ECM).
    The Electronic Control Module (ECM) is required to maintain the exhaust emissions at acceptable levels. The module is a small, solid state computer which receives signals from many sources and sensors; it uses these data to make judgments about operating conditions and then control output signals to the fuel and emission systems to match the current requirements.
    Engines coupled to electronically controlled transmissions employ a Powertrain Control Module (PCM) or Vehicle Control Module (VCM) to oversee both engine and transmission operation. The integrated functions of engine and transmission control allow accurate gear selection and improved fuel economy.
    In the event of an ECM failure, the system will default to a pre-programmed set of values. These are compromise values which allow the engine to operate, although at a reduced efficiency. This is variously known as the default, limp-in or back-up mode. Driveability is almost always affected when the ECM enters this mode.


    REMOVAL & INSTALLATION

    See Figures 1 and 2


    0900c152800a7f96.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fig. 1: ECM mounting scheme-except 1996 models


    0900c152800a7f97.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fig. 2: ECM mounting scheme-1996 models
    The ECM is located in the passenger side footwell in the kick panel up to 1996. In 1996, the ECM is located in the engine compartment next to the battery.

    1. Disconnect the negative battery cable.
    2. Disengage the connectors from the ECM.
    3. Remove the spring retainer off and over the rail of the ECM on vehicles except 1996.
    4. Slide the ECM out of the bracket at an angle.
    5. Remove the ECM.

    To install:
    1. Install the ECM into the bracket.
    2. Install the spring retainer (except 1996) and plug in the electrical connectors.
    3. Connect the negative battery cable.

    Jun 30, 2012 | 1993 GMC Safari

    1 Answer

    Where is bank 1 sensor 2 located on a 1996 Chevy suburban ?


    'Sensor 2' means the sensor is downstream from the exhaust manifold instead of on the exhaust manifold.

    ---
    HO 2S
    The heated oxygen sensor is used by the powertrain control module to measure the amount of oxygen in the exhaust. The PCM uses this data to control the air fuel mixture in the engine. The PCM sends a bias voltage of approximately 450 mV to the oxygen sensor. At operating temperature the oxygen sensor signal varies between 0 and 1,000 mV. When the mixture is rich the oxygen content is low and the voltage signal will remain on the high side of the 450 mV mid-range. When the mixture is lean the oxygen content is high and the voltage signal will remain on the low side below the 450 mV mid-range.
    Typical oxygen sensor 93174g12.gif

    The oxygen sensors on later model vehicles are equipped with a heater circuit. The heater circuit in the oxygen sensor shortens the time required for the sensor to reach operating temperature and provides a more accurate signal.
    IAC Valve

    Dec 12, 2010 | 1996 Chevrolet Suburban

    2 Answers

    Where is the pcm on 96 grand am se what pcm stand 4


    PCM is the Powertrain Control Module. its located behind the glove box in the dash.

    Dec 14, 2009 | 1996 Pontiac Grand Am

    1 Answer

    1994 chevy suburban, no fuel coming from fuel


    Put an injector noid light at the injector plug terminals to see if your getting a signal from the PCM(computer).If not try to find a computer from the same vehicle that works and swap it into yours to check.A PCM swap will take about 15minutes.

    Sep 23, 2009 | Chevrolet Suburban 1500 Cars & Trucks

    1 Answer

    Electronic power steering


    It could be the electronic power steeirng module . With the gauges dropping out like that , the module could be bring down the data bus . Don't know how much you know about automotive electronic's an how the insturment cluster know's what speed to set speedo at an how full fuel gauge is an rpm on the tach .
    Speedometer
    The instrument panel cluster (IPC) displays the vehicle speed based on the information from the engine control module (ECM)/powertrain control module (PCM). The ECM/PCM calculates the vehicle speed based on the class 2 message indicating the wheel reference speed from the electronic brake control module (EBCM) if:
    • The ECM/PCM detects a malfunction in the vehicle speed sensor circuit.
    • The IPC detects a loss of class 2 communications with the ECM/PCM.
    The speedometer defaults to 0 km/h (0 mph) if the IPC detects a loss of class 2 communications with both the ECM/PCM.

    012 GM Class II Communications

    Checking the vehicle modules for DTC'S - diagnostic trouble codes is the first place to start .
    The Power Steering Control Module (PSCM) receives a class 2 vehicle speed message from the Engine Control Module (ECM) via a class 2 serial data circuit. The PSCM uses this vehicle speed message, and other inputs, to determine the desired amount of steering assist.
    DTC C0000
    DTC C0475
    DTC C0476
    DTC C0545
    DTC C0847
    DTC C0848
    DTC C0896
    DTC C0899
    DTC C0900

    your best bet ,take it to a qualified GM repair shop .

    Jul 12, 2017 | 2004 Saturn ION

    1 Answer

    Where is the PCM located on a 1991 Oldsmobile 98 Regency elite?


    The PCMor powertrain control module is only on 1996 and newer cars.Earlier models have a ECM or electronic control module/pcm.You want to change the ECM if its a 1992.Its located under the right hand side of the instrument panel.The ecm has a prom( programmable read only memory)in it.You will need to remove this from the old ecm and install in the new ecm.The ECM/PCM can be used in many different GM vehicles but the prom is very specific and must be used only in the vehicle it was designed.The prom will not come with the new ecm and must be carefully removed and installed on the new ecm.There also is a CALPAK in the ECM ( A devise for fuel delivery) This may come with the new ECM But make sure all parts are the same.You should get a vehicle repair manual to do this job correctly,and make sure you do not damage your PROM.Your PROM is very IMPORTANT!

    Oct 21, 2008 | 1991 Oldsmobile Ninety Eight

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